@article{FAA_1969_3_3_a9,
     author = {L. N. Vaserstein},
     title = {On the congruence problem for classical groups},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {88--89},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1969_3_3_a9/}
}